The plot starts off with Noelle, a young girl with a halo, meeting up with Yuusuke and insisting that he is her husband. That moment starts everything off, Noelle starts to follow Yuusuke around and her family changes around his house and they all move in with him. The plot later turns into something a little more complicated dealing with angels and demons, all surrounded by Noelle and her family, Yuusuke, and those they know/meet along the way.